YOKOGAWA ZR802GTHNN/SCT

Model：ZR802GTHNN/SCT

Manufacturer: YOKOGAWA

Size: 20*20*30cm

Detail Specification: Converter

Comment:Carton

Shipping Weight:4.5Kg

Estimated Lead Time: 12 Weeks

Payment：T/T

HS CODE：9026201090

Unit price (EXW): 3300US dollars

Delivery time: 12 – 16 weeks

product details

YOKOGAWA ZR802GTHNN/SCT

Product Overview

The Yokogawa ZR802G converter serves as the intelligent processing unit of a separate-type zirconia measurement system. When paired with a ZR22G detector, the complete analyzer continuously measures oxygen concentration and humidity under high-temperature conditions without requiring complex sampling devices-1. The Yokogawa ZR802G series is widely deployed for combustion optimization, emission reduction, and process efficiency improvement.

Typical applications for the Yokogawa ZR802GTHNN/SCT include:

Large and small/medium-sized boilers (power generation, heavy oil, gas, coal-fired)

Various industrial furnaces (oil heating, steel reheating, ceramic kilns)

Petrochemical process heaters and reformers

Drying processes using electric heaters or hot gas as heat source

Textile coloring processes and concrete steam curing

Manufacturing and drying for building materials, wood, food products

Humidification processes across various industries-1

Key Technical Specifications

Parameter	Specification
Measurement System	Zirconia system (with ZR22G detector)
O2 Measurement Range	0.01–100 vol%
H₂O Measurement Range	0–100 vol%
Mixture Ratio Range	0–1.000 kg/kg
Repeatability (O₂)	± 0.5% F.S. (0–5 to <0–25 vol% ranges); ± 1% F.S. (0–25 to 0–100 vol% ranges)
Repeatability (H₂O)	± 1 vol% H₂O (sample gas pressure ≤ 2 kPa)
Linearity (O₂)	± 1% F.S. (0–5 to <0–25 vol%); ± 3% F.S. (0–25 to <0–50 vol%); ± 5% F.S. (0–50 to 0–100 vol%)
Linearity (H₂O)	± 2 vol% H₂O (± 0.49 kPa); ± 3 vol% H₂O (≤ 2 kPa)
Drift	Both zero and span: O₂ ± 2% F.S./month; H₂O ± 3 vol%/month
Response Time	90% within 5 seconds
Display	LCD color display, 320 × 240 dots, resistive touchscreen
Digital Communication	HART 7 (AO1, 250–550 Ω), Ethernet (Modbus TCP), RS-485 (Modbus RTU)
Output Signal	4–20 mA DC (maximum 40 mA)
Converter Power Supply	16.6–25.2 V DC
Power Consumption	Max. 800 VA; approx. 330 VA for ordinary use
Enclosure Protection	Equivalent to NEMA 4X / IP66
Installation	Weatherproof design for indoor/outdoor installation
Data Logging	Alarm history and measured value history (up to 40 days)

Core Features and Engineering Advantages

Dual-Function Capability (Oxygen + Humidity)

The Yokogawa ZR802G converter operates both as a zirconia oxygen analyzer and as a high-temperature humidity analyzer, providing exceptional application flexibility from combustion control to moisture management in drying processes-1.

4.3-inch LCD Color Touchscreen HMI

The Yokogawa ZR802G features a 320 × 240 dot LCD color display with a resistive touchscreen, offering intuitive operation and clear visualization of oxygen concentration, cell temperature, and cell electromotive force (EMF)-1.

Self-Diagnosis with Sensor Resistance Check

The deterioration status of the zirconia sensor can be confirmed through the built-in sensor resistance check function, allowing predictive maintenance planning and reducing unexpected downtime-1.

Comprehensive Data Logging

The converter records alarm on/off events and measured value history for up to 40 days, facilitating traceability and process optimization-1.

Multi-Protocol Digital Communication

Remote maintenance and real-time diagnostics are enabled through HART 7, Ethernet (Modbus TCP), and RS-485 (Modbus RTU) communications, significantly reducing maintenance costs and field service requirements-1.

Weatherproof NEMA 4X/IP66 Construction

The Yokogawa ZR802G features weatherproof construction equivalent to NEMA 4X/IP66, allowing installation both indoors and outdoors in demanding industrial environments.

Model Code Breakdown: Yokogawa ZR802GTHNN/SCT

Based on Yokogawa’s ZR802G model code conventions, here is the detailed breakdown of the ZR802GTHNN/SCT configuration:

Code Position	Designation	Value	Interpretation
ZR802G	Series	ZR802G	Zirconia oxygen/humidity converter
T	Mounting/Bracket	T	T—Wall bracket (for ZR402G replacement)
H	Digital Communication	H	HART 7 communication protocol
N	Second Communication	N	None
N	Second Communication Detail	N	None
/SCT	Option Code	SCT	Stainless steel nameplate

Code explanation details:

ZR802G – Converter series designator for the EXAxt ZR family. The ZR802G is the advanced successor to the ZR402G, featuring enhanced digital communication options and expanded data logging capabilities.

T (Mounting/Bracket) – Specifies the wall bracket mounting configuration, designed for straightforward replacement of existing ZR402G installations.

H (Digital Communication) – Denotes HART 7 communication protocol. Other communication options available in the ZR802G series include:

H – HART 7 only

E – HART + Modbus TCP (Ethernet)

M – HART + Modbus RTU (RS-485)-19

N (Second Communication) – Indicates no secondary communication protocol is selected.

N (Second Communication Detail) – Indicates no additional secondary communication details.

/SCT (Option Code) – Stainless steel nameplate, providing enhanced durability for harsh industrial environments and regulatory compliance labeling.

Common ZR802G Configurations

Yokogawa offers numerous ZR802G variants to suit different application requirements:

ZR802G-M-H-N-N/SCT – HART 7 communication with Modbus RTU

ZR802G-T-M-N-N/SCT – Wall bracket mounting with HART + Modbus RTU-21

ZR802G-T-H-N-N – Standard configuration without stainless steel nameplate

ZR802G with /RC option – Ruggedized coating (epoxy + polyurethane) for corrosive environments

ZR802G with /BR option – Wall bracket for ZR402G replacement-19

System Compatibility

The Yokogawa ZR802G converter is designed for seamless integration with:

ZR22G – Separate-type zirconia oxygen/humidity detector (standard configuration)

ZR202G – Integrated-type zirconia oxygen/humidity analyzer (combines detector and converter)

ZO21P-H – High-temperature probe adapter for extended temperature capability

Installation and Operating Requirements

Power Supply: 16.6–25.2 V DC

Power Consumption: 800 VA maximum, approximately 330 VA under normal operation

Environmental Protection: NEMA 4X/IP66 equivalent (weatherproof design)

Mounting: Wall bracket mounting (specified by “T” code)

Communication Wiring: Shielded cables required for HART and Modbus connections

Applications and Industries

The Yokogawa ZR802GTHNN/SCT is deployed across:

Power generation – Coal-fired, gas-fired, and biomass utility boilers

Iron and steel – Sinter plants, reheating furnaces, annealing lines

Petrochemical – Process heaters, reformers, cracking furnaces

Cement manufacturing – Rotary kilns, preheaters, calciners

Pulp and paper – Recovery boilers, lime kilns

Food processing – Industrial boilers, drying ovens, thermal oxidizers

Textile manufacturing – Coloring process humidity control

Concrete products – Steam curing process monitoring-1

Technical Documentation

Complete technical documentation for the ZR802G series is available, including:

General Specifications (GS 11M12A01-01E)

Instruction Manual (IM 11M12A01-02E)

Start-Up Guide and Safety Precautions documentation

HART Device Description (DD) files

Summary

The Yokogawa ZR802GTHNN/SCT represents a sophisticated, feature-rich converter for continuous oxygen and humidity measurement in combustion and drying processes. With HART 7 communication, weatherproof NEMA 4X/IP66 construction, and a user-friendly color touchscreen HMI, this Yokogawa ZR802G converter delivers precise, reliable performance in demanding industrial applications worldwide. For a complete measurement system, pair the ZR802GTHNN/SCT with a ZR22G detector (0.4–5.4 m probe lengths available) to achieve optimal combustion control, energy savings, and emissions reduction.